Smoke was once human and an ally of Subzero but smoke who was an assassin of the lin kuei clan. Smoke and Subzero where went to outworld to kill shang Tsung but failed but as they tried to escape Smoke was caught and Shang Tsung and transformed him into a cyborg and programmed him for evil . As shang Tsung did to cyarax and sketor. A few years later Smoke was found by Noob Saibot, and know smoke is helping noob saibot take over the lin kuei clan. Thats all i really have on smoke right now.
P.S if you want to hear more about the other charecters please tell me alright and i'll find some info on them